Improvement in constructing- picture-frames



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DANIEL W. MARSHALL, OF PAWTUCKET, RHODE ISLAND.

Leners Para: No. 88,651, me April 6, 1869.

IMPROVEMENT IN CONSTRUCTING PICTURE-FRA1WES #aaah- The Schedule referredin these Letters Patent and making part' of the same.

To all whom 'it l11m/y concern:

Be it known vthat I, DANIEL W. MARSHALL, of Pawtucket, in the county ofProvidence, and State of Rhode Island, have invented a new and usefulImprovement in Picture-Frames; and I do hereby declare that thefollowing specification, taken in connection with the drawings making apart of the same, is a full, clear, and exact description thereof.

The drawing represents in its severalparts, indicated as front, back,`andl side front, back, and-side views respectively of the frame.

A, Figures 6 and 7, represents the form of the blanks, which, wheninterlocked, will make a frame of the pattern shown at Figure l.

They consist of pieces of hard wood, or other suitable material, whichcan very conveniently and with great rapidity be cut from stud of Vthethickness shown at iig. 7, by cutters, Figures 4 and 5, suitablyrmounted in a lever, or other press, like those used amongmanufacturing-j ewellers.

Any preferred form, which fancy may suggest, can he given to the ends aa', to vary the expression of the frame when made up.

Through each blank, a mortise, b, is cut, whose width is that ofthethickness of the blank, and Whose length is equal to the width oftheblank, except at that part of the latter where the projecting shoulder,c, is located.

The purpose of this shoulder is to prevent a blank, when its endal isinserted in the mortise'b, as seen in the several figs. 1', 2, 3, frombeing drawn through such mortise, by reason of the obstruction which itpresents, and it should be located upon one edge at a distance equal tothe thickness of a blank from the end of the mortise, as seen at iig. 6.

The particular improvement, which is the subject of this patent,consists in forming, upon the upper edge of each blank, the shoulder c.The location of the shoulder at this' point is material, as it not onlyen- After a suoient number of blanks have been prepared, all that isrequired to complete the frame is, to lock them together.

The blanks are put together by inserting one into the mortise of theother, until it is stopped by its shoulder. A third blank is, in likemanner, inserted into the mortise of the second, a fourth into themortise of the third, and so on indefinitely.

The chain so formed can readily be bent into a circular, or oval formfrom the flexibility of its joints, permitted by the fact that theshoulder c is upon the outer edge only, and the blanks at the respectiveends be locked to form an endless chain by paring oi the shoulder of oneof them, andinserting 'that end in the mortise already in the other. Apin can then be substituted for the shoulder so removed, to preventinterlocking.

A back-board, of proper shap'e, can then be Wired, or otherwise securedto the frame, to hold a picture and any glass plate covering the same.

I am aware that picture-frames have long been made composed of blankshaving shoulders raised upon their at surfaces, and interlocked by meansof slots, similar to those herein described. I therefore do not broadlyclaim a frame so constructed, as my invention relates to the peculiarconstruction of the blank alone; but

I do claim as new, and desire to secure by Letters Patent- Thepictureqrame blank A, with the slot b, and edge shoulder c, arrangedrelatively to each other, as herein described.

DANIEL W. MARSHALL.

Witnesses:

CHARLES W. GREENE, J oHN D. THURsroN.

